Wow, that's interesting. I have never heard of a sunburn kind of pain after a mammogram or an ultrasound - could you have had some sort of skin reaction to the lubricant used with the ultrasound? Since our skin gets so sensitive to sunlight and heat perhaps it's the heat of the ultrasound that is bothering it?
We've had members with costochondritis but they aren't around anymore. This is a common issue with Lupus affecting the connective cartilage holding the ribs to the chest wall and sternum. It might show up in bloodwork as an increase in the blood markers for inflammation. I thought it was mostly in the front of the chest at the sternum, but I know a member who could hardly breath as it caused pain in her entire upper body.
It doesn't seem like costochondritis would cause pain in shoulder, arm & neck since the connective cartilage doesn't extend that far, but who knows?
I hope the rheumy can shed some light on this and give you an appropriate treatment. Let us know what you find out, okay?
Lynnwood, Lupus & Sjogren's Moderator, Dx: 2000DIAGNOSING LUPUS & HW's LUPUS 101
"Life is far too important to be taken seriously." - Oscar Wilde